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Controlled fluorescence in a beetle's photonic structure and its sensitivity to environmentally induced changes.


ABSTRACT: The scales covering the elytra of the male Hoplia coerulea beetle contain fluorophores embedded within a porous photonic structure. The photonic structure controls both insect colour (reflected light) and fluorescence emission. Herein, the effects of water-induced changes on the fluorescence emission from the beetle were investigated. The fluorescence emission peak wavelength was observed to blue-shift on water immersion of the elytra whereas its reflectance peak wavelength was observed to red-shift. Time-resolved fluorescence measurements, together with optical simulations, confirmed that the radiative emission is controlled by a naturally engineered photonic bandgap while the elytra are in the dry state, whereas non-radiative relaxation pathways dominate the emission response of wet elytra.

SUBMITTER: Mouchet SR 

PROVIDER: S-EPMC5204173 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature

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Controlled fluorescence in a beetle's photonic structure and its sensitivity to environmentally induced changes.

Mouchet Sébastien R SR   Lobet Michaël M   Kolaric Branko B   Kaczmarek Anna M AM   Van Deun Rik R   Vukusic Peter P   Deparis Olivier O   Van Hooijdonk Eloise E  

Proceedings. Biological sciences 20161201 1845


The scales covering the elytra of the male Hoplia coerulea beetle contain fluorophores embedded within a porous photonic structure. The photonic structure controls both insect colour (reflected light) and fluorescence emission. Herein, the effects of water-induced changes on the fluorescence emission from the beetle were investigated. The fluorescence emission peak wavelength was observed to blue-shift on water immersion of the elytra whereas its reflectance peak wavelength was observed to red-s  ...[more]

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